Which Statement Best Describes the Life Cycle of an Epidermal

question 23

Multiple Choice

Which statement best describes the life cycle of an epidermal cell?

• A) New epithelial cells in both the stratum basale and stratum corneum push older cells up to the outer surface where they die and slough off.
• B) New epithelial cells in the stratum basale keratinize and slough off.
• C) New epithelial cells in the stratum corneum undergo mitosis approximately every 2 weeks to replace dead cells.
• D) New epithelial cells in the stratum basale push older cells upward; as the cells move up layer by layer, they toughen and die.

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Definitions:

Monobrominated Product

A compound resulting from the substitution reaction where one hydrogen atom in a molecule is replaced by a bromine atom.

Ethylcyclohexane

A chemical compound consisting of a cyclohexane ring with an ethyl group attached to one of its carbons.

2,2,4-Trimethylpentane

An organic compound, also known as isooctane, widely used as a reference standard fuel in the octane rating of gasoline.

Free Radical Bromination

A chemical reaction where bromine radicals substitute hydrogen atoms in hydrocarbons.